.louver-container {
    width: 100%;
    height: 100%;
    background-color: rgb(66, 65, 64);
    display: flex;
    justify-content: center;
    align-items: center;
}

.louver-content {
    width: 966px;
    height: 320px;
    padding: 0;
    overflow: hidden;
}

.louver-item {
    position: relative;
    list-style-type: none;
    width: 160px;
    height: 100%;
    float: left;
    border-left: 1px solid #fff;
    transition: 1s;
}

.louver-content:hover li {
    width: calc(160px - 480px / (var(--l) - 1));
}

.louver-content li:hover {
    width: 640px;
}

.louver-img {
    width: 640px;
    height: 320px;
}

.louver-flag {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #fff;
    background: rgba(0, 0, 0, 0.5);
}